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DirectoryConstruction & ArchitectureArchitecture FirmsBaselNissen & Wentzlaff Architekten BSA SIA AG
Nissen & Wentzlaff Architekten BSA SIA AG Logo
Verified· 2 sourcesTrust Score
Summary

About the company

Management of an architectural firm and the conduct of all related business. The company may participate in similar or related enterprises, purchase, manage, and sell real estate, as well as acquire and exploit industrial property rights and know-how.

Commercial register, canton of BS·As of June 29, 2023View on Zefix
Offering

Products & services

Industry:Architecture Firms
✓ Offered6
Architecture
Planning and realisation of buildings for research, offices, housing, education, healthcare, production and services; including new builds, conversions and refurbishment.
Urban Planning and Site Development
Urban planning concepts, district planning, development studies, development planning and design plans for sites, quarters and location development.
General Planning and Overall Management
Overall planning, local construction management, overall construction management and construction management for complex projects, often in collaboration with specialist planners and international planning teams.
Planning of Research and Laboratory Buildings
Buildings for research, laboratories and innovation with a focus on work processes, collaboration, flexibility and technical performance.
Planning of Office and Administrative Buildings
Office buildings, administrative buildings and headquarters with workplaces, meeting and conference rooms, as well as associated access and service areas.
Planning of Education and Healthcare Buildings
School buildings, university buildings, hospitals, clinics and care facilities, as well as related extensions, renovations and new builds.
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4.1/5

Nissen & Wentzlaff Architekten BSA SIA AG

Trust & reputation

ranQ Trust Score of Nissen & Wentzlaff Architekten BSA SIA AG: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

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Data basis 54% · As of October 2026

Without public customer reviews the score stays capped.

Nissen & Wentzlaff Architekten BSA SIA AG has no value in the Reputation area of the ranQ Trust Score because no data is available. The area carries 42% of the weighting and drops out of the calculation for this profile; it does not lower the score, only the reported data basis.
x
CriterionValueWeight
  • Review quality: No data point — the criterion is taken out of the weighting and does not lower the score.—24%
  • Review volume: No data point — the criterion is taken out of the weighting and does not lower the score.—10%
  • Review recency: No data point — the criterion is taken out of the weighting and does not lower the score.—8%
Nissen & Wentzlaff Architekten BSA SIA AG scores 85.5 out of 100 points in the Substance area of the ranQ Trust Score. This area carries 28% of the weighting.
x
CriterionValueWeight
  • Establishment: Years since founding or brand launch, logarithmic. The maximum is reached at 15 years.100.012%
  • Company size: The headcount band, researched by ranQ or stated by the company. It is scored in steps rather than by head count, because the data only provides bands.55.07%
Nissen & Wentzlaff Architekten BSA SIA AG scores 81.7 out of 100 points in the Identity area of the ranQ Trust Score. This area carries 22% of the weighting.
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CriterionValueWeight
  • Verification: Official register entry (commercial register with UID or professional-body record, 55 points), confirmed domain (20 points) and confirmed ranQ profile (up to 25 points, depending on completeness).81.722%
Nissen & Wentzlaff Architekten BSA SIA AG scores 71.4 out of 100 points in the Visibility area of the ranQ Trust Score. This area carries 8% of the weighting.
x
CriterionValueWeight
  • Website authority: Ahrefs' Domain Rating measures, on a scale of 0 to 100, how strongly a website is linked from other websites. For Swiss SMEs the range up to 40 is typical; the maximum is reached at 35.71.44%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Nissen & Wentzlaff Architekten BSA SIA AG reaches a ranQ Trust Score of 4.1 out of 5.0 — rated «High». No public customer reviews are available for this provider; the rating is based on the remaining criteria. The data basis is 54%, so the score is backed by part of the criteria. As of October 2026.

The Trust Score cannot be bought and is calculated from publicly verifiable data.

Knowledge

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Location

St. Alban-Vorstadt 80
4052 Basel

At a glance

Legal form
Corporation
UID
CHE-108.022.307
Founded
1994 · 32 years
Last commercial register change
June 29, 2023
Employees
1 to 10
Legal form: Graded by liability and disclosure. The weight is kept small: a sole proprietorship is not a dubious company, it is just liable differently.100.06%
  • Branch offices: Branch offices linked in the commercial register. Having none is normal and costs no points.70.03%
    • Full methodology

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